Halley’s comet will reappear in 2061. The comet which was named after the British astronomer, Edmund Halley, last appeared in 1985/86.

Edmund Halley was the first person to recognize that comets traveled in orbits. He was able to expand on Sir Isaac Newton’s laws and principles about motion and gravity. Halley used Newton’s mathematical formulas to correctly predict when the comet would reappear. Halley  made these predictions in his Synopsis Astronomia Cometicae, published in 1705. Continue reading →